.defaultbar{
    border:1px solid #A9C9E2;
    height: 20px;
    width: 50%;
    background-color: #FFFFE0;
    margin:30px auto;
    position: relative;
}
.defaultbar .completed{
    height: 12px;
    width: 50%;
    background-color: #7d9edb;
    top: 4px;
    left: 1px;
    position: absolute;
}
.defaultbar .sider{
    height: 30px;
    border: 1px solid #A5B6C8;
    background-color: #E6E6FA;
    top: -6px;
    width: 10px;
    display: block;
    cursor: pointer;
    position: absolute;
}